Thanks Bryan :TFrom an RT60 standpoint (really more for larger rooms but OK for reference), you'd want to be around 200ms in the midrange - maybe 250 in the lows and 160-170ms in the high end. You're really more interested in RT30 which is a bit more than 1/2 of those times but most people don't like it that dead.
Untreated, the low end is now probably closer to 1 second or a bit more.
I will measure on Saturday morning but I will probably need guidence if that is oklease:
I will post the results on here.
Just one more thing, how do you cut rockwool into triangles?